ULTRASONIC VELOCITY AND ABSORPTION IN BINARY-SOLUTIONS OF SILICON DIOXIDE AND WATER

Ultrasonic velocity and absorption coefficient at 21 MHz as well as sh ear viscosity, were measured in an aqueous solution of silicon dioxide over the temperature range of 5-85 degrees C, and the concentration r ange of 20 to 40% by weight. The absorption coefficient exhibits maxim um values at about 25 degrees C. The velocity exhibits a maximum value at approximately 64, 66, 68 degrees C in 40, 30 and 20% concentration solutions, respectively. The ultrasonic velocity and absorption incre ase with concentration at a given temperature. The shear viscosity val ues increase with concentration and decrease with temperature for a gi ven concentration.